Doubling Cube [Tenth Edition] San Diego Comic-Con 2017 Set: Vanguard Series Type: Vanguard

Set: Vanguard Series Type: Vanguard Rarity: Rare Whenever a creature deals damage to you

the Lost Prince: Attack At the beginning of your end phase

Set: Diamond & Pearl: Stormfront Type: Water Rarity: Holo Rare Retreat cost: Colorless

Set: XY: Generations Type: Fire Rarity: Common Retreat cost: Colorless

(Mana symbols on that permanent remain unchanged

Doubling Cube [Tenth Edition] San Diego Comic-Con 2017 Set: Vanguard Series Type: VanguardSet: Tenth Edition Type: Artifact Rarity: Rare Cost: {2} {3}, {T}: Double the amount of each type of unspent mana you have. The cube's surface is pockmarked with jagged runes that seem to shift when unobserved.